Two flowers per seed:Derivatives of CoG@F127/GO with enhanced catalytic performance of overall water splitting |
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作者姓名: | Yue Han Chen Qian Huayu Wu Xing Chen Xue Wu Wei He Hui Yan Guisheng Li Guowang Diao Ming Chen |
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作者单位: | School of Chemistry and Chemical Engineering;College of Chemistry and Chemical Engineering;Department of Chemistry;Chinese Education Ministry Key Laboratory of Resource Chemistry;Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) |
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基金项目: | The funding support from the National Natural Science Foundation of China(Grant No.21773203);the“Qinglan project”of Jiangsu Province(2018-12);a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions is acknowledged。 |
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摘 要: | In this work,cobalt glycerate(CoG@F127)nanosheets grown on the surface of graphene oxide(GO),i.e.CoG@F127/GO,have been synthesized with the assistance of nonionic surfactant Pluronic F127 via a hydrothermal method.After calcination,CoG@F127/GO is transformed into one derivative,Co nanoparticles coated with a trace amount of carbon(Co-C)on GO(Co-C/GO).The Co nanoparticles consist of an atypical core-shell structure,in which the core and the shell are both Co.Co-C anchored on GO can avoid the nanoparticles aggregation and expose more active sites for hydrogen evolution reaction(HER)to significantly improve the catalyst activity of HER.CoG@F127/GO is phosphatized to form the other derivate,cobalt pyrophosphate coated with a small amount of carbon(Co2P2O7-C)on GO(Co2P2O7-C/GO).Co2P2O7-C/GO composite owns a large electrochemical active surface area(ECSA)and fast rate towards oxygen evolution reaction(OER).Furthermore,the two derivatives of CoG@F127/GO,i.e.Co-C/GO and Co2P2O7-C/GO as twin flowers,are assembled into an overall water splitting electrolytic cell with a cell voltage of 1.56 V to deliver a current density of 10 mA cm-2.
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关 键 词: | Surfactant assistance Cobalt glycerate nanosheets Atypical core-shell structure Cobalt pyrophosphate Water splitting |
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